In this engaging discussion, Erin Gibson, an Assistant Professor of Psychiatry at Stanford and a researcher on myelin's impact on brain health, tackles the pivotal role of sleep in cognitive function and Alzheimer's risk. She reveals how age-related changes in sleep patterns, like increased napping, could serve as early indicators of neurodegenerative diseases. Gibson's research also uncovers myelin's potential as a missing link in understanding brain insulation and health, emphasizing the need to view our nightly rest as vital for long-term cognitive resilience.